Minister for Regional Development
Minister for Ports
Minister for Science and Innovation
Minister for Medical Research
Minister for Kimberley
Leader of the Government in the Legislative Council
Member for Western Australia

Stephen was elected to represent the Mining & Pastoral Region at the 2013 state election. He served as Shadow Parliamentary Secretary for the Kimberley, Pilbara, Gascoyne and Goldfields-Esperance regions before being promoted to the position of Shadow Minister for Mental Health; Disability Services and Child Protection in September 2013.